Thumbnails

US$    € EURO    ¥ YEN    £ POUND    CAN$    AUS$    Note

(click on a page number to go to that page:)

1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
25

 page 24 / 25  -  prev  -  next  -  bottom  -  Home 

2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C271 - color change Dravite $ 250 (=~ CAN$ 0)
Nchongo, Umba Valley, Tanzania
thumbnail - 1.6 x 1.4 x 1.2 cm


color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c271a.jpg] color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c271b.jpg]

Single Dravite crystal exhibiting the 'Usambara effect' color change (named after nearby mountains). This is a different type of color change than the Alexandrite effect, where the color changes in different types of lighting. In this case, the Dravite crystal appears green in normal lighting, however when a single light source is transmitted through the crystal, at a certain thickness, a sudden color shift from green to red is observed, while less thick areas remain green. Well terminated, complete crystal. This is often demonstrated by taking thin slices of crystals. If, for instance, the critical thickness is 3mm, you can take two slices that are 2mm thick each, and each will appear to be green. If you overlap them slightly, creating a combined thick ness of 4mm the area that is overlapped will appear red. This crystal is dark but very transparent, gem quality. One chip on the termination.Transparent red with strong backlighting.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C272 - color change Dravite $ 150 (=~ CAN$ 0)
Nchongo, Umba Valley, Tanzania
thumbnail - 1 x 0.9 x 0.8 cm


color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c272a.jpg] color change Dravite from Nchongo, Umba Valley, Tanzania [db_pics/pics/c272b.jpg]

Single Dravite crystal exhibiting the 'Usambara effect' color change (named after nearby mountains). This is a different type of color change than the Alexandrite effect, where the color changes in different types of lighting. In this case, the Dravite crystal appears green in normal lighting, however when a single light source is transmitted through the crystal, at a certain thickness, a sudden color shift from green to red is observed, while less thick areas remain green. Well terminated, complete crystal. This is often demonstrated by taking thin slices of crystals. If, for instance, the critical thickness is 3mm, you can take two slices that are 2mm thick each, and each will appear to be green. If you overlap them slightly, creating a combined thick ness of 4mm the area that is overlapped will appear red. This crystal is dark but very transparent, gem quality.Transparent red with strong backlighting.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C280 - Wulfenite with Mimetite $ 250 (=~ CAN$ 0)
Rowley Mine, Maricopa Co., Arizona, USA
thumbnail - 3 x 2.8 x 2 cm


Wulfenite with Mimetite from Rowley Mine, Maricopa Co., Arizona, USA [db_pics/pics/c280a.jpg] Wulfenite with Mimetite from Rowley Mine, Maricopa Co., Arizona, USA [db_pics/pics/c280b.jpg] Wulfenite with Mimetite from Rowley Mine, Maricopa Co., Arizona, USA [db_pics/pics/c280c.jpg]

Orange Wulfenite crystal on matrix associated with Mimetite. Wulfenite crystals reach 1cm in size.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C284 - Cinnabar in Calcite $ 600 (=~ CAN$ 0)
Terlingua, Brewster Co., Texas, USA
thumbnail - 2.8 x 1.8 x 1.5 cm


Cinnabar in Calcite from Terlingua, Brewster Co., Texas, USA [db_pics/pics/c284a.jpg] Cinnabar in Calcite from Terlingua, Brewster Co., Texas, USA [db_pics/pics/c284b.jpg] Cinnabar in Calcite from Terlingua, Brewster Co., Texas, USA [db_pics/pics/c284c.jpg]

Single yellow scalenohedral Calcite crystal with a sharp phantom of Cinnabar. This is a rare specimen from the old mercury mining district of Terlingua, located near the Mexican border. Cinnabar was discovered here in the 1880s, creating a temporary mining town, now nothing remains but a ghost town.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C301 - Galena on Fluorite $ 100 (=~ CAN$ 0)
Rogerly Mine, Durham, England
thumbnail - 2.7 x 2 x 2 cm


Galena on Fluorite from Rogerly Mine, Durham, England [db_pics/pics/c301a.jpg] Galena on Fluorite from Rogerly Mine, Durham, England [db_pics/pics/c301b.jpg] Galena on Fluorite from Rogerly Mine, Durham, England [db_pics/pics/c301c.jpg]

Interpenetrating transparent green Fluorite cubes with attached Galena. Fine and undamged.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C308 - Rhodochrosite $ 120 (=~ CAN$ 0)
1050 level, Burgin Mine, Eureka, Utah, USA
thumbnail - 2.5 x 2 x 1.5 cm


Rhodochrosite from 1050 level, Burgin Mine, Eureka, Utah, USA [db_pics/pics/c308a.jpg] Rhodochrosite from 1050 level, Burgin Mine, Eureka, Utah, USA [db_pics/pics/c308b.jpg]

Pink Rhodochrosite crystals on matrix from an old lead mine in Utah. In excellent condition.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C315 - Descloisite over Wulfenite $ 280 (=~ CAN$ 0)
Los Lamentos, Chihuahua, Mexico
thumbnail - 2.5 x 2 x 1.9 cm


Descloisite over Wulfenite from Los Lamentos, Chihuahua, Mexico [db_pics/pics/c315a.jpg] Descloisite over Wulfenite from Los Lamentos, Chihuahua, Mexico [db_pics/pics/c315b.jpg] Descloisite over Wulfenite from Los Lamentos, Chihuahua, Mexico [db_pics/pics/c315c.jpg]

Blocky Wulfenite crystals coated by Descloisite. Ex. Robert Lambert collection with label. Label is dated 1994.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C321 - Tanzanite $ 250 (=~ CAN$ 0)
Merelani Hills, Arusha, Tanzania
thumbnail - 2.7 x 0.8 x 0.7 cm


Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c321a.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c321b.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c321c.jpg]

Single pink Tanzanite crystal with attached Calcite and/or Zeolites. Solid base that tapers out towards the top into multiple, feathery terminations. Pink is one the rarest colors for Tanzanite (or Zoisite if you prefer) and this one has well saturated color. Complete and undamaged. Unusual crystal from a late 2017 find.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C322 - Tanzanite $ 250 (=~ CAN$ 0)
Merelani Hills, Arusha, Tanzania
thumbnail - 2.5 x 0.8 x 0.5 cm


Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c322a.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c322b.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c322c.jpg]

Single pink Tanzanite crystal with attached Calcite and/or Zeolites and graphite at the base. Solid base that tapers out towards the top into multiple, feathery terminations. Pink is one the rarest colors for Tanzanite (or Zoisite if you prefer) and this one has well saturated color. Complete and undamaged. Unusual crystal from a late 2017 find.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C323 - Tanzanite $ 250 (=~ CAN$ 0)
Merelani Hills, Arusha, Tanzania
thumbnail - 2.7 x 0.8 x 0.7 cm


Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c323a.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c323b.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c323c.jpg]

Single pink Tanzanite crystal with attached Calcite and/or Zeolites. Solid base that tapers out towards the top into multiple, feathery terminations. Pink is one the rarest colors for Tanzanite (or Zoisite if you prefer) and this one has well saturated color. Complete and undamaged. Unusual crystal from a late 2017 find.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C330 - Tanzanite $ 150 (=~ CAN$ 0)
Merelani Hills, Arusha, Tanzania
thumbnail - 2.7 x 1.3 x 0.9 cm


Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c330a.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c330b.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c330c.jpg]

Single pink Tanzanite crystal with attached Calcite and/or Zeolites. Multiple, feathery terminations along the sides but top is contacted. Pink is one the rarest colors for Tanzanite (or Zoisite if you prefer) and this one has well saturated color. Complete and undamaged. Unusual crystal from a late 2017 find.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C329 - Tanzanite $ 150 (=~ CAN$ 0)
Merelani Hills, Arusha, Tanzania
thumbnail - 2.5 x 0.5 x 0.4 cm


Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c329a.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c329b.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c329c.jpg]

Single pink Tanzanite crystal with attached Calcite and/or Zeolites. Pink is one the rarest colors for Tanzanite (or Zoisite if you prefer) and this one has well saturated color. Complete and undamaged. Unusual crystal from a late 2017 find.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C327 - Tanzanite $ 250 (=~ CAN$ 0)
Merelani Hills, Arusha, Tanzania
thumbnail - 2.7 x 0.7 x 0.6 cm


Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c327a.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c327b.jpg]

Single pink Tanzanite crystal with attached Calcite and/or Zeolites. Solid base that tapers out towards the top with crystals all over the terminations. Pink is one the rarest colors for Tanzanite (or Zoisite if you prefer) and this one has well saturated color. Complete and undamaged. Unusual crystal from a late 2017 find.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C324 - Tanzanite $ 220 (=~ CAN$ 0)
Merelani Hills, Arusha, Tanzania
thumbnail - 2.8 x 0.6 x 0.6 cm


Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c324a.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c324b.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c324c.jpg] Tanzanite from Merelani Hills, Arusha, Tanzania [db_pics/pics/c324d.jpg]

Single pink Tanzanite crystal with attached Calcite and/or Zeolites. Pink is one the rarest colors for Tanzanite (or Zoisite if you prefer) and this one has well saturated color. Complete and undamaged. Unusual crystal from a late 2017 find.
2018-06-20 19:50:31 (PDT): Notice: Undefined index: cand: /mnt/vol-97eb4796/data/mm/www.marinmineral.com/s_present_common.php: line 53


C340 - Tantalite $ 300 (=~ CAN$ 0)
Minas Gerais, Brazil
thumbnail - 2.8 x 1 x 0.3 cm


Tantalite from Minas Gerais, Brazil [db_pics/pics/c340a.jpg] Tantalite from Minas Gerais, Brazil [db_pics/pics/c340b.jpg] Tantalite from Minas Gerais, Brazil [db_pics/pics/c340c.jpg]

Well formed single Tantalite crystal, with a thin tabular shape and perfect smooth sides. Medium luster, complete all around and undamaged except for a little edge wear or contact on the back part of upper left edge. Out of an old collection.



(click on a page number to go to that page:)

1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
25

 page 24 / 25  -  prev  -  next  -  top  -  Home 

©2010-2018 Marin Mineral